Key-lock.



E. W. MARVEL.

KEY LOCK.

APPLICATION FILED FEB. 10. 1913.

1,166,380., Patented De0. 28,1915.

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E. W. MARVEL.

KEY LOCK. APPLICATION F iLED FEB. 1 0, 191s.

Patented Dec.28,1915.

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COLUMBIA PLANOGRAPH co Mumn'mh n c E. W. MARVEL.

KEY LOCK.

APPLICATION FILED FEB. 10. 1913.

Patented Dec 28, 1915. v

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EDWARD WILLEY MARVEL, OF PHILADELPHIA, PENNSYLVANIA.

KEY-LOCK.

7 Specification of Letters Patent. Patented DQQ. 28, 1915.

Application filed February 10, 1913. Serial No. 747,351.

To all whom it may concern Be it 7 known that I, EDWARD VVILLEY MARVEL,a citizen of the United States, and resident of Philadelphia, in theState of Pennsylvania, have invented a certain new the use of twodifferent keys toeflecteach opening movement of the lock; and it is theob ect of my invention to provide such a lock which may be set, by akey, so that it may be repeatedly operated by one key, until it isresetto be operated by two keys.

As hereinafter described, my invention ineludes a lock having a rotarykey hub with 1 two separate keyways, respectively for a guard key and amain key, and includ ing mechanism whereby both of said keys arenormally required to besuccessively inserted in said key hub to turn thelatter to open the look, but which may be so set, con veniently'by saidguard key, that the lock may be repeatedly operated by one other key,hereinafter termed the master key, until said mechanism is reset tonormal condition, conveniently by the main key.

In the drawings Figure I is an outer face view of a lock convenientlyembodying my improvement. Fig. II is a plan view of said lock. Fig. IIIis a vertical sectional view of the lock, taken on the line III, III inFig. I. Fig. IV is a .view similar to Fig. I but with the casing frontplate removed to show the lock mechanism in normal position, requiringtwo keys, to wit, a guard key and a main key. to unlock it. Fig. V is aview similar toFig. IV but showing the lock mechanism as set, by theguard key, to permit its repeated operation by the single master key.Fig. VI isa view similar to Figs. IV and V but with the lock mechanismshifted into unlocked position by the main key. Fig. VII is a view ofthe, lock in the position shownin Fig. V but with the tumblers removed,Fig. VIII is a plan sectional view, taken on the line VIII, VIII in Fig. VII. Fig. IX is a plan View of the key hub and cam connectedtherewith. Fig/X is an elevation of the guard key. Fig. XI is anelevation of the main key arranged to cooperate with the guard key tounlock said lock. Fig. XII is an elevation of a master key by which thelock may be operated.

My invention includes the various novel features 01. construction andarrangement hereinafter more definitely described.

In said drawings: 1 is the lock bolt which is fitted to slide in thelock casing Qhavin'g the cover 3 removably secured by the screws 4; inthreaded engagement with the sockets 5 in said casing. Said bolt 1carries-the stump 7 fitted to enter the gatings 8 of the tumblers9 whichare mounted to oscillate on the stud 10 which is stationary in saidcasing 2,

but said'stump 7 has the notch 12 at the inner end thereof adaptedtoengage the -serrations 130a said tumblers when an attempt is made toretract the bolt with said gatings out of alinement with said stump.Each of said tumblers 9 is provided with a spring 15, hearing at itsfree end upon said casing 2 and tending to, thrust the tumblers downwardto the position shown in Figs.

IV and V. Each of said tumblers 9 is also provided with a projection 16adapted to be engaged by the hook end 17 of the detent 1 18 which ispivoted on the stud l9 stationary in the casing 2 and provided with thespring 23 hearing at its free enduponsaid casing and'tending to turnsaid detentinto engagementfwith said projections 16qon the tumblers 9,so as to detain the latter in locked position, as shown in Fig. IV. Saiddetent 18 has the arm25 extending in opposition to the arm 26 of theguard lever 27, so that when the latter, which is fulcrumed on the stud29 stationary in said casing 2, 1s rocked :from the position shown inFig. IV to the position shown in Fig. V said detent is released from thetumblers 9 to permit the latter tobe turned by the key into theunlooking position shown in Fig. VI in which their gatings 8 are broughtintoalinement Wlljll said stump 7. Said guard lever 27 has the stump 28adapted to enter the gatings 30 of the guard tumblers 31 which arepivoted on said; stationary stud 19 and each provided with a spring 32bearing at its free end upon said casing 2 and tending to turn saidtumblers31 into the position shown in Fig. IV, in'which position theyare stopped by their projections 3st encountering said stump 28. Saidguard lever 27 has the arm 36 carrying the stud 37 which is adapted tobe encountered by the releasing tumbler 38 which is pivoted on said stud19 and prorestored to its normal position shown in Figs; IV' and VI, bydownward movement of said releasing tumbler 38. Said guard lever is alsoadaptedtobe released and returned to its normal position aforesaid bythe releasing lever 42 which is fulcrumed on the screw 43 in said casing2 and has its rear end 45 extending in cooperative relation with t-hearm 36 of said guard lever 27, and its opposite end 46 extending incooperative relation with the releasing projection u on one ofsaidtumblers 9. a

'The rotary key hub 50 has the cam 51 extending in the recess 52 of thebolt 1 so as to shift the latter back and forth when said hub is turned.Said hub isprovided with two keyways 541 and 55 which are convenientlyformed in diametricalalinement, andfwhen in registry with the respectiveslots 56 and 57 in the hub bearing 58 on said cover 3, said keyway 54 isadapted to receive the guard kev 60, shown in Fig. X,-

and the keyway 55 is adapted to receive either themain key 61, shown inFig. XI,

or the master key 62 shown in Fig. XII.

Said keys are. used to manipulate said lock as follows: The lockmechanism being in the position shown in Figs. I and IV; the guard key60 is inserted in the keyway 54; in the hub 50 and the latter turned,clockwise, approximately sixtv degrees, the shape of said recess 52being such as .to permit such movement of the cam 51 without shiftingthe bolt 1. Said key 60 is bitted so as to sweep the tumblers 31 intoposition to receive the 'stump28 in their gat-ings 30 and to then turnsaid "lev'er 2 7 into the position shown in Fig. V, the projection '64on said cam 51 being so shaped as to encounter the shoulder on saidlever to turn the latter. Thereupon,said hub 50 being returned to itsnormal position shown in Figs.' I and IV, and said key 60being'withdraw'n, the lock is in condition to be operated to retract thebolt 1 by the main key 61 shown in Fig. XI.

Said main key 61 being then inserted in the keyway 55 of the hub 50 thelatter'is' turned,

clockwise, from the position shown in Fig.

V to the position in Fig. VI. Said key 61 is bitted so as to sweep thetumblers 9 into position to receive the stump 7 in their gat-.. ings 8thus permitting the cam to turn to the position shown in Fig. VI inwhich the slide bolt 1 is fully retracted. It may be observed, withreference to Fig. VI, that the unlocking movement last described, causesthe releasing projection l7 to encounter the end l6 of the releasinglever 42 and turn the latter from the position shown in Fig. V to theposition shown in Fig. VI so as to release the guard lever 27, from thedetent 18 so that the latter is ready to reengage the projections 1601said tumblers 9 when the latter are freed from the stump 7 by thelocking movement of the slide bolt 1. Moreover, such releasing movementof the guard lever 27, from the position shown in Fig. V to the positionshown in Fig. VI, frees the guard tumblers 31 from the stump 28 andpermits them to return to their normal position with their projections34 against said stump. Therefore, when the lock is thus operated by theguard key 60 and the main key 61, both of said keys are required toeffect each opening movement of the lock. However, when the lockmechanism is set into the position shown in Fig. V, by the operation ofthe guard key 60 as above described, the lock may be repeatedly operatedby a single key, to wit, the master key 62, shown in Fig. XII. It may beobserved that although said master key 62 is inserted in the same keywayas the main key 61, to wit, the keyway 55 of the hub 50, and turned inthe same di rection, said key 62 is so bitted that it does not raise thetumbler 9 having the releasing projection a7, and consequently operationof the lock by said key 62 does not operate the releasing lever 42.Therefore, the, detent 18, guard lever 27, guard tumblers 31 and theparts associated therewith remain in the inoperative position shown inFig. V, during the repeated operation of the look by the key 62. Inorder to permit such operation, the tumbler 9 provided with thereleasing projection 17 has the auxiliary gating 65 to receive saidstump 7. Itis to be understood that both of said groups of tumblers 9and .81. are changeable to form different combinations requiring keyswith correspondingly changed bittmgs to operate them. Moreover, it is tobe understood that I do not desire to limit myself to the precisedetails of construction and arrangement herein set forth as it isobvious that various modifications may be made therein without departingfrom the essential features of my invention asdefined in the appendedclaims.

I claim:

1'. In a key lock, the combination with a slide bolt; of mechanismarranged to normally detain said bolt in locked position, so

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constructed and arranged as to require the operation oi? two keysto'unlock said bolt; and change mechanism whereby the other mechanismsaforesaid may be set to permit the lock to be operated by one key.

In a lock, the combination with a slide belt; of tumbler mechanismarranged in two groups normally requiring two keys to unlock said bolt,and mechanism whereby the lock may be set to be operated by one key.

3. In a changeable combination key lock, the combination with a slidebolt; of a rotary key hub with two separate 'keyways, respectively for aguard key and a main key; main tumbler mechanism arranged to detain andrelease said bolt in accordance with the position thereof, guard tumblermechanism arranged to detain and release said bolt in accordance withthe position thereof, including a guard lever in cooperative relationwith a pivoted detent for said main tumblers; releasing mechanism,including a releasing tumbler in the group of main tumblers, and areleasing lever operatively connecting said releasing tumbler with saidguard lever, arranged to release said detent; whereby a guard key and amain key are normally required to be successively inserted in therespective keyways in said key hub to turn the latter, to open the lock,but said guard key may be turned to set the lock mechanism so that itmay be repeatedly operated by another key, inserted in the main keyway,until the lock is reset to normal condition by said main key.

i. In a changeable combination key lock, the combination with a slidebolt; of a rotary key hub with two separate keyways,

respectively for a guard key and a main key; main tumbler mechanismarranged to detain and release said b it in accordance with the positionthereof; guard tumbler mechanism arranged to detain and release saidbolt in accordance with the position thereof, including a guard lever incooperative relation with a .detent for Said main tumblers; releasingmechanism, including a releasing tumbler, and a releasing leveroperatively connecting said releasing tumbler with said guard lever,arranged to release said detent; whereby a guard key and a main key arenormally required to be suecessively inserted in the respective keywaysin said key hub to turn the latter to open the look, but said guard keymay be turned to set the lock mechanism so that it may be repeatedlyoperated by another key.

In a changeable combination key lock, the combination with a slide bolt;oi rotary key hub with two separate keyways, respectively for a guardkey and a main key; main tumbler mechanism arranged to detain andrelease said bolt in accordance with the position thereof; guard tumblermechabier arranged to detain and release said boltin accordance with thepositionthereof, includinga pivoted detent for said. main tumblers;releasing mechanism, including a releasing tumbler in the "group of'main tumblers, and a releasing lever operatively connecting saidreleasing tumbler to release said detent; whereby a guard key and a mainkey are normallyrequired to be successively inserted in the respectivekcyways in said key hub to turn the latter to open the lock, but saidguard key may be turned to the lock mechanism so that it may berepeatedly operated by a single key.

6. In a changeable combination key lock, the combination with a slidebolt; of a rotary leyhub with two separate keyways, respectively for aguard key and a main key; main tumbler mechanism arranged to detain andrelease said bolt in accordance with the position thereof; guard tumblermechanism arranged to detain and release said bolt in accordance withthe position thereof, including a detent for said main tumblers;releasing mechanism, including a releasing tumbler in the group of maintum- 7 releasingtumbler to release said detent; whereby a guard key anda mam key are normally required to be successively inserted in therespective keyways in said key hub to turn the latter to open the lock,but said guard key may be turned to set the lock mechanism so that itmay be repeatedly operated by a single key.

In a changeable combination key lock, the combination with aslide bolt;of a rotary key hub; main tumbler mechanism arranged to detain andrelease said bolt in accordance with the position thereof; guard tumblermechanism arranged to detain and release said bolt in accordance withthe position thereof, including a detent for said main tumblers;releasing.mechanism, including a releasing tumbler in the group of maintumblers, and means operatively connecting said releasing tumbler torelease said dctent; whereby a guard key and a main key are normallyrequired to be successively inserted in said key hub to turn the latterto open the lock, but said lock mechanism may be set so that it may berepeatedly operated by a single key.

S. In a changeable combination key lock,

the combination with a slide bolt; of a rotary key hub; main tumblermechanism arranged to detain and release said bolt in accordance withthe position thereof; guard tumbler mechanism arranged to d-stain andrelease said bolt in accordance with the position. thereof, including adetent for said main tumblers; releasing mechanism, including areleasing tumbler and a releasing lever operatively connecting saidreleasing tumbler to release said detent;

and means operatively connecting said a i v 1,166,380

whereby a guard key and amain key are signed my name. at Philadelphia,Pennsylnormally required to be successively insert- Vania, this sixthday of February, 1913.

V the look, but said lock mechanism may be ed'in said keyv hub to turnthe latter to open EDWVARD "VILLEY MARVEL set so that it may berepeatedly operated by WVitnesse s:

a single key. ARTHUR E. PAIGE,

' In testimony whereof, I have hereunto \VM. H. HOLLAR, Jr.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

- Washington, D. C.

